Bob...Found an excavator for you. <img src=http://antwrp.gsfc.nasa.gov/apod/image/0611/trencher2_smd.jpg> <A HREF="http://antwrp.gsfc.nasa.gov/apod/ap061122.html" target="_blank">http://antwrp.gsfc.nasa.gov/apod/ap061122.html</A>